Valve-gear mechanism



J. C. GLENN.

VALVE GEAR MECHANISM.

APPLICATION FILED JAN. I5. 1918.

1 06,332. Patented June 10, 1919.

4 SHEETS-SHEET I J. C. GLENN. VALVE GEAR MECHANISM. APPLICATION FILEDJAN. 15. I918.

Patented June 10, 1919.

4 SHEETS-SHEET 2.

J. C. GLENN. VALVE GEARMECHANISM. APPLICATION FILED JAN- 15, HUB.

Patented June 10, 1919.

4 SHEET$--SHEET 3.

J. C. GLENN. VALVE GEAR MECHANISM. I APPLICATION FILED JAN- I5. 1918.1,306,332. PatentedJunelO, 1919.

4 SHEETSSHEET 4.

UNITED s A-rns PATENT; OFFICE...

Joiai 0, cream, PENNsYLvANIA.

VALVE-GEAR MECHANISM.

To all whom it may concern:

Be it known that I, JOHN C. GLENN, a clt zen of the United States,residing at Erie,-in the county of Erie and State of Pennsylvania, haveinvented certain new and usefullmprovements in Valve-Gear Mechanism;and, I do hereby declare the following to be a full, clearyaind exactdescription of theinventiom suchzas will enable others skilled in theart to which it appertainsto make andfuse the same, reference being hadto the accompanying drawings, andqto the letters of reference markedthereon, forming 'part of this specification. I I

My invention relates to valve gear for steam engines, and 'consistsdncertain imhetof a fly-ball governor drivenfrom the engine,

shaft. I Thelast mentioned form of govern ing, mechanism has beengenerally employed when it was desired touse a quiclcrelease orsnap-gear, whlch permits thesteamad:

mission valves to snap shut instantly. When the fly-wheel governor hasheretofore been used to control the actionofthe engine inftake. valves,the. valve-gear so operates that the OPBIllIlgQIIlOVBIIlQHb and closingmovement of. the steam admission valves is Zgr'ad ual ineach case,

he object of my :is therefore to construct a valve-geari'mechanismwhich. canbe so controlled by-a fly wheel governor mechanism thatlthe.steam admission valves willbe released from their opening mech-.-

anisrnand permitted to instantly close,with.

out referenceto the reverse, movement of said-waiveopening-,grnechanismp h. ,-lT.o.

wheel governor, and'connect the VqlVellfte ing' mechanism with a -iixedeccentric on the eng e Sh t eta-W n. th *Y i Q raised .a predetermineddistance the action tithe g v mqr al sea he releasing mi t tripgthe.gear and permit the valve to snap e1 5 fly w eelsqvemerj is-. ediit isneeessary to oscillate thereleasing' cams'v a c mp hth a ieg Leoim thevle ing-cams.W th t e wrist pm fthe .v-,

Specification of Letters Patent. Patented June 10, 1919. Applicationfiled January 15, 1918. Serial No. 211,934 I The valve-gear of myinvention hereinafter described and pointed out is readily adaptable foruse in combination with either puppet valves or valves of theCorliss-type, Without material change.

In carrying out my invention I provide a fixed eccentric'on the engineshaft, which operates to open the admission valves, and I provide ashaft or fiy-wheel governor mechanism, and connected cam mechanism whichoperates to sooner or later release the valve opening mechanism andthereby permitthe steam admission valves toinstantly close as thespeedof the engine increases or decreases. These and other features of myinvention are hereinafter: more particularly described and pointed outandare illus -trated in .the accompanying drawings in Whichi I, I

Figural, is a side elevation of New engine showing the I fly-wheelgovernor and valve-gearIof my invehtionthereon. I T

Fig. 2,Iis an elevation of the same showing the oppositesideof theengine, showing thefixed eccentricand connecting gearfor opening theadmission valves.

Fig. 3, is anenlarged side View of a porti on. thereof. I I

-Fig. 4,.is an enlarged plan view thereof.

Fig. 5, is a perspective view of a portion 1 I thereof removed from itssupports and taken apart. I In; these drawlngs A indicates the'engineframe; A indicateslthe cylinder; A indicates the fly-wheel-securedniponthe shaft A all of usualconstruction.

In these drawings I- show admission valve mechanism of the puppet typeofrusual con- 7 structiomprovided with a yoke B having a slot B (seeFig. 3) and a spring 13 to close the valve, which is inclosed in ahousing B This; housing is provided with pairs of. arms 6. and b.Mounted in the ends of'the arms 6 .upon the stud-posts C5 are disks C,and

secured? between -;sai ddisks by means of screws or rivets c is aleveroW ich extends from the axis offsaid jstudqposts .G into the slots B.in;the.yoke5B,the upperedge QfLSaid; leve .0 I rv ng downwar 'f cm. theaxis.

of said: studposts to the points of said lever. ;f--

preferably sagas ivefr 59 its it matches the contour; of the.disks G'jat that pc tic i th eof b w en he. disks :0 cm. the point where t elower edge theneofimeets the periphery of said disks'toa point VQItbcally above the axis thereof, from which point down to the axis of saiddisks the space between said disks is unoccupied.

B in the yoke B into the spacebetween the disks 0 adjacent to the axisthereofand rests-uponthe curved upper edge of the lever C and secured inthe upperjendof the yoke B is a set screw b which engages the lever D;said set screwbeing provided with a lock nut b to prevent accidentalmovement of said set screw. a g

Thedisks C C and lever G are provided on their peripheries withcoincident shoulderscby means of which the lever .0 may be caused toraise the lever D and yoke B to open theadn'iission valve (not shown).

Mounted upon the stud-post C between the disk C and one of the arms 5(see Fig. 2) is, a lever E, to the upperend of which is pivoted a dog Eadapted to engagethe' shoulder c onthe disk C, and I provide a spring awhich presses downwardly on the dog E.

Mounted on the cylinder A is a rock-shaft E which is provided ontheinner end thereof with a lever E '(see Figs. 2 and 4) and. I between theupper end of the lever E and the lower. end of the lever E is pivoted alink E4. The outer end ofthe rock shaft is provided 'witlra lever Fwhichis con nected to the fixed eccentric F on the engine shaft A bymeans of eccentric rod mechanism F of ordinary construction, so that asthe eccentric F rotates the levers E :are

, caused to oscillate and through the dogsE engaging the shoulder 0' onthe disks 0 and lever C is caused to oscillate thereby lift ing thelever D and yoke B; V

The 'dog E is provided-at its free end with an offset or laterallyprojecting hoal" der'e' (see Figs; l,3 and '4) which projects 7 beyondthe sideface ofthedisks C; oppo-i site the lever E; and upon thestud-post C and arinb on that side I mount 'a cam G (see Figs. 1 and 3)adapted to engage the offseticfon the dog E and disengage saiddog fromits engagement wltlrthe shoulders 0 andpe'rm'itting the springlB toforce the yoke Band; lever D and lever Q instantly to return to theirusual positionsyjas shown in i Fig, 3, The cam G is provided with alever G by means of'w'hich saidcain-G may bees cillated'as hereinafterdescribed Mounted upon the" engine cylinder 'A is a rock-shaft 7 H th'einner end'of which is provided with" V an mm H, andmimed betweenth'ejiipper. v end'of the lever H antllthe lower end of the 1 alsoprovided at its outer end, witlra lever H which isconne'cted with thewifi's t' pi n J lever G is'a li'nkG Theirock-shaft H is eein aI-iIW v aside of said housing a disk isecuredon s'aid" rOck-Shaft *ha'vinga Vratchet shoulder' on rock -shaft, a dog carried lever and;

' j r, The 'governor'inechanis m. showniin Fig. 1 1s ofordlnaryconstruction and operation, ex-

.cept when it is atrrest the wrist-pin J is at the center" oraxi's o'fthe engine shaft A ;a1 1 dwhen the speed of the engine increases, sa dwr1st+p1n gradually becomeseccentrlc to theakis of the shaft therebyvczuisingthe cams" G to oscillate more or less according to th'espeed ofthe engine ;,and itis obvious that when the engine isbeing started thatthe disk C and-lever C ,willflbe'o'scillated ting a sooner releasedissig the VZLIVQL' 3": Inorder to cushion the returnofEthe lever C toits-normal position, I 'p'ro'v'iden dash? pot mechanism L I (see Fig.3 3ofusualcon struction, the stem er which is pivoted jtof the lever C,said dash-pot beingcontrolled by the usual valve Lby means of whiclrany"noise may be eliminated; a

InFig. 2 I have showaarms jMvonfthe lever F, and rods-M extendingtherefroni to exhaust valve operating levers N, by means of which thesaid} exhaust valve levers may be operated fronr'the'fix'edeccentricfinfthe usual manner. r 7

Having thus fully shown and described my invention so *that others canutilize the same, I do not desire'to b'e' limited to the exact"construction of "mechanism" herein shown and described, as it is obviousthat;

many changes can be made therein without departing from the scopelofmyinvention; therefore what I claim as new 'desire t0'- secure byLettersPatent is": 1

1f In a valve gear, a housing, ja' yoke 'ver V tically "movable in saidmusing; ayspring l-1 0- V i vifard position, a vertically'oscillatingleverf' .p1v'oted at oneside of said housing 'and jejxrenormall'y' retaw n "down? tending towardsaid yoke, a pi'ojectionion thehub of saidlever, another lever pivoted on the pivot of said first lever, arbgpiroted; on "said leverand toenga'ge 1 sa1 d pro ect1on, meansto-oscillatesaid' lasfi V mentioned" 'lei'e g'f and "means to disengagesaid dog from sflld pro] ectlon, ai leverpivoted at the opposite side ofsaid housingex tending through said yoke and restingf upon 3thejfirstiiamed leve'rand adapte'djtofengage e: i' e,'jt ib en il yas rforthil. '2; In a valve gear, housing", yaival-ire stem therein, 'arock-shaft "supported at oine;

periphery thereof, a lever metfit'edjgn said adapted to engage saidratchet shoulder, a fixed eccentric on the engine shaft, eccentricactuated mechanism connected to said lever whereby said lever, disk androck-shaft are caused to oscillate, means operated by said rock-shaftadapted to lift said valvestem, and means supported on said housingadapted to disengage said dog from said ratchet shoulder, substantiallyas set forth.

3. In a valve gear, a housing, a valvestem therein, a rock-shaftsupported at one side of said housing, a disk secured on saidrock-shaft, a ratchet shoulder on the periphery thereof, means securedon said rockshaft adapted to lift said valve-stem, a lever mounted onthe axis of said rock-shaft, a dog carried thereby adapted to engagesaid ratchet shoulder on said disk, eccentric actuated mechanism adaptedto cause said lever to oscillate, an oscillatory cam mounted on the axisof said rock-shaft, a lever secured thereto, and governor controlledmech anism adapted to operate said lever and cause said cam to oscillatewith relation shaft, a dog carried thereby adapted to engage saidratchet shoulder, means operated by said fixed eccentric to operate saidoscillatory lever, a cam movably supported adj acent to said diskadapted to engage and disengage said dog from said ratchet shoulder, andmechanism connected to said cam and said governormechanism to controlthe movement of said cam, substantially as set forth.

5. In a valve gear, an engine shaft, a fixed eccentric thereon, acentrifugal governor on said shaft, a valve-stem housing, a valve-stemtherein, a rock-shaft mounted on said housing, a disk on saidrock-shaft,

a ratchet shoulder on said disk, means operated by said rock-shaftadapted to lift said valve-stem, an oscillatory lever mounted on theaxis of said rock-shaft, a dog carried by said lever adapted to engagesaid ratchetshoulder, means operated by said fixed eccentric to actuatesaid oscillatory lever, an oscillatory cam mounted on the axis of saidrock-shaft and adapted to engage said dog and disengage the same from'said ratchet shoulder, and means operated by said centrifugal governormechanism to control the oscillations of said cam with relation to thespeed of the engine, substantially as set forth. 7

6. In a valve gear, an engine shaft, a fixed eccentric thereon, acentrifugal governor mechanism on said shaft, avalve-stem housing, avalve-stem therein, a rock-shaft mounted adjacent to said housing, meanssecured on said shaft adapted to lift said Valve-stem, a disk on saidrock-shaft, a

ratchet shoulder on said disk, an oscillatory.

lever mounted on said rock-shaft, a dog carried by said lever andadapted to engage said ratchet shoulder, a projection on said dogextending laterally beyond the face of said disk, eccentric rodmechanism connected to said fixed eccentric and said oscillatory lever,an oscillatory cam mounted on said rock-shaft and adapted to engage saidprojection on said dog and disengage said dog from said ratchetshoulder, a lever on said cam, and means to operatively connect saidlever with said governor mechanism, whereby, when said governormechanism is operated said cam will be oscillated in opposition to saidoscillatory lever and the length of said oscillations controlled by saidgovernor with relation to the speed of the engine, substantially as setforth.

7. In an engine valve gear, mechanism operated by a fixed eccentric toopen a steam admission valve, and mechanism controlled by a governoractuated shiftable eccentric adapted to disengage said valve openingmechanism, substantially as set forth.

In testimony whereof I afiix my signa ture.

JOHN G. GLENN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Batents, Washington, D. G.

